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Edible-nest Swiftlet

(Aerodramus fuciphagus, Thunberg 1812)

1. Introduction

1.1 Description

Edible-nest swiftlets are small insectivorous birds from the swift family Apodidae. Weighing in at a mere 8·7–14·8 grams and measuring in at 11·5–12·5 cm in length, this species is known to be an excellent flyer and can spend the long periods foraging in the sky without rest (HBW). Edible-nest swiftlets may be observed over a wide variety of habitats (even far out at sea) and are widespread throughout South-east Asia today. This bird is well known (and studied) in the region due to its nest being widely collected or farmed as a delicacy known as bird’s nest soup or ‘燕窝’ in Chinese.

1.2 Identification in Singapore

A medium sized swiftlet with glossy dark brown upperparts. Rump tends to appear paler grey, but variable and can appear uniform. Brown-grey underparts except almost black undertail coverts, significantly forked tail. Naked or lightly feathered tarsi.

Hardly indistinguishable in flight from slightly larger Black-nest Swiftlet (Aerodramus maximus) in flight, unless seen exceedingly well enough to pick out the slight (1-2 cm) difference in size, square-ish tail with shallow or no notch, and bulkier head and body of the Black-nest Swiftlet. In hand, identification is possible as Black-nest Swiftlet has extensive black feathering on tarsi. Appears to be indistinguishable in flight from potential migrant Himalayan Swiftlet (Aerodramus brevirostris).

1.3 Etymology

The genus Aerodramus stems from two Greek words ἀερο (“aero”) and δρόμος (“dromos”), with aero meaning ‘air’ and dromos meaning ‘path’; the swiftlets are thus named because the air is their path.

The specific epithet fuciphagus originates from Greek as well, with φυκι (“fukos”) meaning ‘seaweed,’ and φαγος (“phagos”) meaning ‘to eat’. This is likely a result of the (false) historical belief that the swiftlets consume seaweed or substances from sea mist which allows it to produce a gelatinous substance with which it builds its nest with.

Edible-nest Swiftlet in flight. (Photo: Lim Hong Yao, 2017)



1. Introduction

    1.1 Description
    1.2 Identification in Singapore
    1.3 Description

2. Range and subspecies

3. Ecology and behaviour

    3.1 Feeding
    3.1 Reproduction
    3.1 Echolocation

4. Human interactions

    4.1 Bird's nest soup
    4.2 "Blood nests"
    4.3 House farming

5. Taxonomy and phylogenetics

    5.1 Species taxonomy
    5.2 Subspecies taxonomy

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